So you never visit family or friends where you can relax and be informal? (Sans shoes)?
I'm never invited to take my shoes off in someone else's house, so of course I don't. Because it would be rude to sit there with my shoes off when everyone else has got theirs on, surely? But it doesn't mean I'm not able to relax in their houses, or I'm not made welcome.
Or in this scenario where you'd place your own perception of manners above the homeowners? Good manners are supposed to be about making the other person comfortable, so refusing to remove your shoes when asked by the homeowner because you reason that you'd be making yourself overly comfortable in someone else's house is really just about putting your own needs before the homeowners. thats not what good manners are about.
I have already said (possibly even twice on this thread) that I wouldn't refuse to take my shoes off if I was asked, so I don't know where you got that imaginary scenario from. But it's interesting that it doesn't seem to apply in reverse where people are saying that they would automatically take their shoes off.
I specifically said that I wouldn't be offended by being asked to take my shoes off (although in my 45 years it has only happened once) but that I get pissed off about being told I have no manners for not being able to mindread.
I don't really understand the hygiene argument either because most people I know have pets. I don't understand how dogs can walk outdoors and indoors and that's fine, but humans walking outdoors then indoors is unhygienic.